Revert of (Reland) Use logdog butler subcommand to run tests. (patchset #18 id:340001 of https://codereview.chromium.org/2753993002/ )

Reason for revert:
https://build.chromium.org/p/chromium.android/builders/Marshmallow%2064%20bit%20Tester/builds/10403

Original issue's description:
> (Reland) Use logdog butler subcommand to run tests.
>
> Previously we ran tests, without setting butler environment variables.
> This will run into NotBootstrappedError when we try to upload test
> results through logdog.
>
> In this cl, we use logdog butler subcommand to run tests, which will set
> butler environment variables before hand.
>
> BUG=692287
>
> Review-Url: https://codereview.chromium.org/2695963003
> Cr-Commit-Position: refs/heads/master@{#456976}
> Committed: https://chromium.googlesource.com/chromium/src/+/de2df28c86b13227040aba5f9f5a1d1f869b81eb
>
> patch from issue 2695963003 at patchset 820001 (http://crrev.com/2695963003#ps820001)
>
> Review-Url: https://codereview.chromium.org/2753993002
> Cr-Commit-Position: refs/heads/master@{#458264}
> Committed: https://chromium.googlesource.com/chromium/src/+/1ad3437632699fb98fdd46a3ba6ad8d63cf10ee5

TBR=dpranke@chromium.org,hzl@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=692287

Review-Url: https://codereview.chromium.org/2767633003
Cr-Original-Commit-Position: refs/heads/master@{#458607}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 86ea5a365e6c928bca676dd4621e6d9ef848e357
7 files changed